Spring fatigue is the tired, sluggish feeling many people notice in March and April, as days lengthen and temperatures rise. It is not a medical diagnosis, and science has no single explanation, but the body adjusting to more light, warmer weather and the clock change is the most likely reason. It usually passes within two to four weeks. Daylight in the morning, outdoor movement, regular sleep and fresh seasonal food help most; tiredness that lasts longer deserves a check-up.
Key facts about spring fatigue
- Typical timing: March to April in Central Europe, often starting with the first warm days.
- Typical duration: a few days to about four weeks. Fatigue that lasts longer is not "just spring".
- Vitamin D levels are usually at their lowest at the end of winter, because the skin makes little vitamin D between roughly October and March at Swiss latitudes.
- Daylight saving time in Switzerland begins on the last Sunday in March, which shifts your internal clock by one hour.
- Birch pollen, one of the most common allergy triggers in Switzerland, peaks from March to April; hazel and alder start as early as January.
- Common symptoms: tiredness despite enough sleep, low drive, sensitivity to weather, dizziness when standing up quickly, headaches.
What is spring fatigue, and is it real?
Spring fatigue is real as an experience: in surveys in German-speaking countries, many people report feeling unusually tired in early spring. It is not a disease, and there are few solid studies on it, so most explanations are plausible rather than proven. The German term, Frühjahrsmüdigkeit, is so common that it has become a household word, while English speakers often describe the same thing simply as feeling sluggish when the seasons change.
Spring fatigue symptoms
- Feeling tired and heavy even after a normal night's sleep
- Low motivation and difficulty concentrating
- Sensitivity to changes in the weather
- Dizziness or light-headedness, especially when standing up
- Headaches and irritability
What causes spring fatigue?
Several changes come together in early spring. None of them is harmful on its own, but the body needs a little time to adapt.
| Possible cause | What happens | What you can do |
|---|---|---|
| More daylight | Your internal clock adjusts; the balance between the hormones melatonin (night) and serotonin (day) shifts | Get daylight in the morning; keep evenings dim |
| Warmer temperatures | Blood vessels widen and blood pressure can drop slightly, which may cause tiredness or dizziness | Drink enough, stand up slowly, move regularly |
| Clock change | Losing an hour in late March disturbs sleep for some days | Go to bed 15 minutes earlier on the days before |
| End of winter | Less activity and lower vitamin D status after months of little sun | Spend time outdoors; ask your doctor about vitamin D |
| Pollen | Hay fever can disturb sleep and cause tiredness; some antihistamines make you drowsy | Speak to your pharmacist about suitable treatment |
Can spring allergies cause fatigue?
Yes. Hay fever is a common and often overlooked reason for feeling tired in spring. A blocked nose disturbs sleep, the allergic reaction itself is tiring, and some older antihistamines cause drowsiness. If your tiredness comes with sneezing, itchy eyes or a runny nose, an allergy is a likely factor.
How long does spring fatigue last?
For most people, spring fatigue lasts from a few days to about four weeks, until the body has adapted to the longer days and warmer temperatures. It tends to start with the first warm spell in March and to be over by late April or May. If you still feel exhausted after a month, or if tiredness comes with other symptoms such as breathlessness, weight loss or persistent low mood, see your doctor. Iron deficiency, low vitamin B12, thyroid problems and depression can all cause long-lasting fatigue.
How to beat spring fatigue: what helps
- Morning daylight. A 20 to 30 minute walk outdoors in the morning gives your internal clock the clearest signal that the day has begun.
- Movement outdoors. Cycling, walking or running in the fresh air combines light and activity. Start gently if you have been less active over winter.
- Regular sleep. Keep similar bed and waking times, and prepare for the clock change by shifting bedtime a little earlier a few days before.
- Enough fluids. When temperatures rise, you need more to drink. Water and unsweetened tea are the best choices.
- Lighter, fresher meals. Replace some heavy winter dishes with vegetables, salads, pulses and whole grains.
- Short breaks in the day. A few minutes outside after lunch helps more than a third coffee.
Seasonal spring foods
Spring brings back fresh produce in Switzerland: wild garlic (March to April), lamb's lettuce, spinach, radishes, spring onions, rhubarb and asparagus (April to June), with the first strawberries from May. Wild garlic, spinach and radishes provide vitamin C, while leafy greens supply folate. A plate built from these foods covers many nutrients at once.
Which vitamins help with spring fatigue?
No vitamin is a cure for spring fatigue, and if you are well supplied, extra vitamins will not make you more alert. Where your intake is low, however, several nutrients matter. Vitamins B2, B6 and B12, niacin, pantothenic acid, folate and vitamin C, as well as iron and magnesium, contribute to the reduction of tiredness and fatigue. Our guide to vitamins for tiredness and fatigue explains which deficiencies make you tired and how to recognise them.
Vitamin D deserves a mention because levels are usually lowest at the end of winter. Vitamin D contributes to the normal function of the immune system and of muscles. If you spent little time outdoors over winter, ask your doctor whether a blood test is useful. Our winter health guide explains why vitamin D drops in the dark months.
What does a spring reset mean?
A spring reset means adjusting your routines to the new season: more daylight and movement, lighter meals, steadier sleep and a fresh look at what you eat. It is not a detox or a fasting cure. The body clears waste products continuously through the liver and kidneys, and no juice or tea speeds this up. A realistic spring reset is about small changes you can keep through to summer. For more practical ideas, see our natural ways to feel more energetic.
How Sanbera fits into a spring routine
A supplement is a complement to daylight, sleep and fresh food, not a replacement. If you want to cover the nutrients involved in energy metabolism reliably, Sanbera's Daily Essential formulas provide them in moderate amounts. Per daily serving of 3 tablets:
- Daily Essential Women: vitamin B6 1.05 mg (75% NRV), vitamin B12 1.88 µg (75% NRV), folic acid 150 µg (75% NRV), vitamin C 43.1 mg (54% NRV), iron 7 mg (50% NRV), vitamin D 3.22 µg (64% NRV).
- Daily Essential Men: vitamin B6 1.4 mg (100% NRV), vitamin B12 1.88 µg (75% NRV), folic acid 100 µg (50% NRV), vitamin C 51.8 mg (65% NRV), iron 3.5 mg (25% NRV), vitamin D 3 µg (60% NRV). It also contains guarana, a source of caffeine.
Vitamins B2, B6 and B12, niacin, pantothenic acid, folate, vitamin C and iron in these formulas contribute to the reduction of tiredness and fatigue. If your tiredness lasts beyond a few weeks, a blood test is more useful than any supplement. As the days get warmer, our summer reset for hot days picks up where spring leaves off.
Frequently asked questions
What is spring fatigue?
Spring fatigue is a temporary feeling of tiredness, low drive and weather sensitivity that many people notice in March and April. It is not a disease. The most likely explanation is that the body is adjusting to longer days, warmer temperatures and the clock change. It usually fades within a few weeks without treatment, helped by daylight, movement and regular sleep.
How long does spring fatigue last?
Usually from a few days to about four weeks. Most people feel back to normal by late April or May, once the body has adapted to the new season. If you still feel exhausted after a month, or tiredness comes with other symptoms, see your doctor to check for causes such as iron deficiency, low vitamin B12, thyroid problems or depression.
Is spring fatigue real or a myth?
Many people clearly experience it, but there is little solid research, so its causes are not proven. Plausible explanations include the shift in the body's day-night rhythm as daylight increases, lower blood pressure in warmer weather, the clock change and low vitamin D at the end of winter. Hay fever can add to the tiredness. It is a normal adjustment, not an illness.
Can spring allergies cause extreme fatigue?
Hay fever can make you very tired. A blocked nose disturbs sleep, the allergic reaction itself is draining, and some antihistamines cause drowsiness. If tiredness comes with sneezing, itchy eyes or a runny nose, ask your pharmacist or doctor about non-drowsy treatment. Extreme or lasting exhaustion without allergy symptoms should always be checked by a doctor.
How can I fight spring fatigue naturally?
Go outside in the morning daylight, move regularly in the fresh air, keep consistent sleep times and prepare for the clock change by going to bed a little earlier. Drink enough as it gets warmer, and choose lighter meals with seasonal vegetables. Make sure your diet covers B vitamins, vitamin C and iron, which contribute to the reduction of tiredness and fatigue.
Sources
- National Institutes of Health, Office of Dietary Supplements: Vitamin D, Health Professional Fact Sheet
- NHS: Hay fever
- Pollen und Allergie (aha! Swiss Allergy Centre, pollen data from MeteoSwiss): Pollen forecast and pollen calendar for Switzerland
- European Commission: EU Register of nutrition and health claims
- World Health Organization: Physical activity fact sheet
This article is for general information and does not replace advice from a doctor or pharmacist. Food supplements are not a substitute for a varied, balanced diet and a healthy lifestyle.